Program details:

[CBS 8:00] Good Times[Reg]: The Dinner PartySeason 2, episode 19
W: Robert Fisher, Phil Naples, Allan Manings D: Herbert KenwithWith Frances Foster (Gertrude Vinson).
An elderly resident of the projects appears to be living on pet food. She comes to dinner at the Evans' apartment and brings the main course, which they suspect is made from dog food.